Apparatus for scarfing billets and the like



Jan. 17, 1950 J, NICQLAISEN 2,494,627

APPARATUS FOR SCARFING BILLETS AND THE LIKE Filed July 10, 1947 sSheets-Sheet 1 INVENTOR REIDAR J. NICOLAISEN ATTORNEY? Jan, 17', 1950 R.J. NICOLAHSEN 2,494,627

APPARATUS FOR .SCARFING BILLETS AND THE LIKE Filed July 10, 1947 3Sheets-Sheet 2 INVENTOR REIDAR J. NICOLAISEN ATTORNEYJ 1950 R. J.NICOLAISEN 2,494,527

APPARATUS FOR SCARFING BIL-LETS AND THE LIKE Filed July 10, 1947 3SheetS-Sheet 3 HG. 6 ZLWA 5:4 M

Aa/J INVENTOR L REIDAR J. NICOLAISEN Patented Jan. 17, 1950 APPARATUSFOR SCARFING BILLETS AND THE LIKE Reidar J. Nicolaisen, New York, N. Y.,assignor to Air Reduction Company, Incorporated, a corporation of NewYork Application July 10, 1947, Serial No. 760,157

8 Claims. (Cl. 266-23) This inventionrelates to apparatus for scarfingor desurfacing ferrous metal bodies, and more particularly to apparatusfor simultaneously scarring all four faces of billets, blooms, slabs,and other work-pieces of rectangular cross-section.

Scarfing machines have already been proposed for simultaneously scarfingall four faces Of a billet or the like in which four scarflng heads areadjustably mounted so that a succession of workpieces of the same ordifferent cross-sectional dimensions can be scarfed. However, in some ofthe machines previously proposed it is necessary to position one pair ofadjacent scarflng heads in a different plane from the other pair so thatthe heads will not strike or interfere with one another when they aremoved inwardly from their positions for scarfing a work-piece of maximumsize ,to their positions for scarfing a smaller workpiece. In othermachines rather complicated mechanism is required to provide for thevarious movements the scarfing heads must have when they move intooperative relation with the workpiece and when they accommodatethemselves to work-pieces of difi'erent cross-sectional dimensions, andeven so, the danger of the scarfing heads striking or interfering withone another when they are so moved is not completely avoided.

Another disadvantage of the'previously proposed scarfing machines isthat certain movements of the scarfing heads are provided for byguideways, and by slides mounted to move rectilinearly in them. Theproper functioning of such parts is more likely to be interfered with bythe accumulation of dirt and slag from the scarfing operations thanpivoted connections.

One object of this invention is to provide improved scarfing apparatusadapted to simultaneously scarf all four faces of metal bodies ofrectangular cross-section and of various crosssectional dimensions, andhaving scarflng heads or scarfing tips so mounted that they can alwaysbe moved without interference between them into an operative positionwith respect to the workpiece even though they may at times lie in thesame general transverse plane.

Another object is to provide scarfing apparatus adapted tosimultaneously scarf all four faces of a work-piece of rectangularcross-section in which all movements of the scarfing tips which causethem to accommodate themselves to workpieces of various cross-sectionaldimensions are provided for by pivotal connections as distinguished fromconnections of the sliding type.

A further object of the invention is to provide scarfing apparatusadapted to simultaneously scarf all four faces of work-pieces ofrectangular cross-section and of various cross-sectional dimensionswhich is simpler in construction than 2 apparatus previously proposedfor the same purpose.

Scarfing apparatus embodying the invention is illustrated in theaccompanying drawings, in

which:

Figure 1 is a plan view of the apparatus;

Fig. 2 is a side elevation of the apparatus shown in Fi 1;

Fig. 3 is an end elevation of the apparatus shown in Fig. 1 drawn to alarger scale and viewing the apparatus from the left in Fig. l, i. e.,viewing it toward the discharge faces of the scarfing tips; and

Figs. 4, 5 and 6 are diagrammatic views show- I ing the positionsassumed by the scarflng tips and their associated parts when scarfingwork-pieces of different cross-sectional dimensions.

, The scarfing apparatus in its preferred form comprises a base l0(Figs. 1 and 2) and a superstructure mounted thereon having a portion Hwhich overhangs the base and extends transversely over the conveyorrolls |2 Of a mill table on which a work-piece W to be scarfed (Figs. 2and 3) such as a billet, slab, or the like, is supported and fed throughthe scarflng apparatus in the usual way. An arm l3 depends from theportion H of the superstructureiFigs. 1 and 2) and A pair of tip armsare pivotally mounted in each of the carriers H and IS. The two tip armsthat are mounted in the carrier l4 are shown at 2| and 22 in Fig. 1 andthe two that are mounted in the carrier 5 are shown at 23 and 24in thisfigure. Each of the tip arms is mounted in its carrier to pivot about ahorizontal axis 25 (Fig. 2). Thus the forward end of each of the tiparms is movable vertically. The tip arm 2| is operatively connected tothe piston of a fluid cylinder 26 adapted when supplied with motivefluid such as air to lift the forward end of the arm and swing it aboutits horizontal pivot axis 25. Weights 2'! supported by the rear end ofthe tip arm 2| counterbalance a portion of the weight of the forward endof the arm and reduce the load imposed on the hydraulic motor 26. Whenthe motive fluid is discharged from the cylinder amass? fluid cylindersfor the tip arms 22, 23 and 23 are shown at 29, 30 and 3|, respectively,in Fig. 1. However, the fluid cylinder 23 associated with the tip arm 22may remain idle or entirely disconnected, if desired, since the forwardend of this tip arm can, and preferably is, raised when necessary byconnections with the tip arms 2| and 23 when the forward ends of thesearms are raised as will hereinafter more fully appear.

The forward end of the tip arm 2| carries a rigid tubular member 32which extends transversely of the apparatus and transversely over thework-piece W. This member is secured to the tip arm 2| by means of aclamp 33 (Fig. 3) attached to the tip arm by bolts 36. Keys 35 preventthe clamp from turning on the tip arm. The upper horizontal torch tipT1, i. e. the one that is intended to scarf the top face of theworkpiece, is connected to the tubular member 32 by means of brackets 36attached to a plate 31 which in turn is secured to the torch tip bybolts 38. In Fig. 3 the other torch tips are shown at T2, T3 and T4, thetips T2 and T4 being the vertically disposed tips for scarflng the:vertical side faces of the work-piece and the tip Ta being the otherhorizontal tip for scariing the bottom face of the work-piece.

The forward end of the tip arm 23 carries a member 39 which extendstransversely of the ap paratus and transversely under the work-piece Was shown in Fig. 3. This member is secured to the tip arm 23 by a clampiii attached to'the tip arm by bolts ll. The Keys 52 prevent the clampfrom turning on the tip arm. The transversely extending member assupports the horizontal tip T3 for scarflng the bottom face of thework-piece.

The torch tip T2 is attached to the forward end of the tip arm 22 by aclamp 33 secured to the tip arm by bolts i l and prevented from turningon the arm by means of keys 35. A retaining plate 36 connects the torchtip to the clamp 43.

In a similar manner, the torch tip T4 is secured to the forward end ofthe tip arm 26 by means of a clamp i attached to the: tip arm by bolts48 and prevented from turning on the tip arm by Keys 39.

Referring to Figs. 1 and 2.. lever arms 30 and are secured,respectively, to the rear ends of tip arm carriers l4 and l5. The rearends of the lever arms 50 and 5| are operatively connected to thepistons of fluid cylinders 52 and 53, respectively, (Fig. 1). Thesefluid cylinders are double-acting. When motive fluid such as air isadmitted to the rod end of the cylinder 52, the carrier M in which thetip arms 2| and 22 are mounted is moved about the axis of its pivot pinin a direction such that the forward end of the carrier moves outwardaway from the work-piece, and when motive fluid is admitted to the headend of the cylinder the carrier is moved in the opposite direction tomove its forward end inward toward the work-piece. The other carrier I5in which the other two tip arms 23 and-24 are mounted is moved in asimilar manner by admitting air or similar motive fluid to the rod endor the head end of the fluid cylinder 53. The tip arms 2| and 22 beingmounted in the carrier ll partake of its movement about its pivot pin20, and similarly, the tip arms 23 and 24 being mounted in the carrierl5 move with it when it is swung about its pivot pin. Therefore, it willbe seen from Fig. 3 that when the forward end of the carrier M moveshorizontally in either direction the forward ends of the two tip arms 2|and 22 will move horizontally in unison and the two torch tips Ti and T2carried by them will also move horizontally in unison. In other words,the horizontal distance or relationship between the torch tips T1 and T2never changes. However, since the forward ends of the tip arms 2| and 22can be moved vertically independently of each other, the torch tips T1and T2 can also be moved vertically independently of each other.Similarly, when the forward end of the carrier i5 is moved horizontally,the forward ends of the tip arms 23 and 24 will be moved horizontally inunison and the tips T3 and T4 carried by them will also movehorizontally in unison. Thus the horizontal relationship between thetips T2 and T4 never changes although each tip can be moved verticallyindependently of the other because the forward ends of the tip arms 23and 26 are independently movable in a vertical direction.

A stop arm 54 extending upward from the tip arm 24 abuts at its upperend against a plate 55 on the under surface of the tubular transversemember 32. The stop arm is of such length that the forward end of thetip arm 26 can never approach the transverse member 32 close enough tocause the upper end of the tip T4 to strike the left end of the tip T1in Fig. 3 when there is relative horizontal movement between the twotips. When the forward ends of the tip arms 2| and 22 are movedhorizontally relative to the forward ends of the tip arms 23 and 2%,thereby causing relative horizontal movement between the transversemember 32 and the stop arm 5 the upper end of the stop arm slides on theplate 55, or vice versa. A similar stop arm 56 extends downward from theforward end of the tip arm 22 and abuts at its lower end against theupper surface of the lower transverse member 39. Thus the forward end ofthe tip arm 22 can never approach the transverse member 39 close enoughto cause interference between the lower end of the tip T2 and the rightend of the tip T3 in Fig. 3 when these two tips are moved relatively ina horizontal direction. When there is relative horizontal movementbetween the forward end of the tip arm 22 and the transverse member 39,the lower end of the stop arm 56 slides on the upper surface of themember 39, or vice versa.

A stop device 51 is secured to the clamp ll and cooperates with the stoparm 54 to limit the approach of the two transverse members 32 and 39.

A member 58 (Fig. 3) is attached to the clamp 33 by the clamping bolts34 and projects inwardly far enough to engage the clamp 43 when theforward end of the tip arm 2| is moved upward by its fluid cylinder fromthe position shown in Fig. 3 to a position in which the lower rightcorner of the tip T1 is about even with the upper left corner of the tipT2. This position of the parts is shown in Fig. 4. Further upwardmovement of the tip arm 2| to the neutral position hereinafter describedwill move the tip arm 22 along with it to the latters neutral position.Thus, movement of the tip arm 2| to its neutral position moves both thetorch tip T1 and the torch tip T2 to the upper limit of their verticalmovement. Similarly, a member 59 (Fig. 3) at tached to the clamp 40 bythe clamping bolts 4| projects inward far enough to engage the clamp 41when the tip arm 23 moves downward from the position shown in Fig. 3 farenough to bring the upper left corner of the tip T3 about even with thelower right corner of the tip T4 as shown in Fig. 4. Further downwardmovement of the tip arm 23 then moves the tip arm 24 downwardauger? lyalong with it, thus moving both the torch tips '1: and T4 to the lowerlimit of their vertical movement.

The torch tips may be of any suitable type, the particular ones shown inthe drawings being of the block type having a row of drilled jetpassages from whose discharge orifices the scarfing oxygen jets issue.In Fig. 3 the tips are viewed in a direction looking toward theirdischarge faces. The discharge face of each tip is shown at M in Figs.1, 2 and 3 and the discharge orifices from which the scarflng oxygenjets issue are shown at 62. The scarfing jets are projected at an angleagainst the corresponding surface of the work-piece to scarf ordesurface it thermochemically when the surface metal is at kindlingtemperature, as is well understood in the art. Each torch tip may alsobe adapted to project preheating flames from the discharge face of thetip onto the surface of the work-piece to heat the surface metal tokindling temperature. While the portions of the torches from. which thescarflng jets and the preheating flames issue have been referred to asscarfing tips it should be understood that this term is used to applyalso to so-called scarfing heads having a row of individual nozzlesthrough which the scariing jets issue instead of passages drilleddirectly in metal blocks.

The various pipes, conduits, and hoses usually employed for conductingthe scarflng oxygen, the preheating gases, and the cooling fluid, to thetorch tips have not been shown in the drawings for the sake of clarity.

The scarfing operation may be controlled remotely in accordance withconventional practice by solenoid valves, electric switches etc.--noneof which have been shown in the drawings be cause they form no part ofthe invention. Moreover, the piping system for conducting motive fluidto and from the fluid cylinders, and the control system for the fluidcylinders, have not been illustrated. Any suitable control system forthem may be used whereby the fluid cylinders may be separately orsimultaneously controlled, or controlled in any desired combination.

The neutral position of the parts is not shown in the drawings but it isthe position assumed by the parts when the forward ends of the tip arms2! and 22 are in their highest and outermost position and the forwardends of the tip arms 23 and 2d are in their lowest and outermostposition. In other words, the forward ends of the tip arms 2| and 22 andthe pair of torch tips T1 and T2 would be in a higher and more outwardposition than shown in Fig. 4 and the forward ends of the tip arms 23and 2t and the pair of torch tips T: and T4 would be in a lower and moreoutward position than shown in this figure. Ample passage is thenprovided for introduction of the end of the work-piece into the expandedopening between the torch tips. The torch tips are moved to neutralposition after each scarfing operation. Now assuming that the work-pieceW in Fig. l is a work-piece of the maximum size that the apparatus isadapted to scarf, and that it has been fed into the scarfing apparatusfar enough for its forward end to be in operative relation with thetorch tips when they are moved inwardly against it, motive fluid isadmitted to the head end of the cylinders 52 and 53 to swing the tip armcarriers inwardly, and motive fluid is also admitted to the cylinders 30and ill to raise the forward ends of tip arms 23 and 2t, and the motivefluid is released from the cylinder 28 to allow the forward ends of tiparms I! and 22 to descend by their own weight. The fluid cylinders maybe operated in this manner either simultaneously or successively. In anyevent the result is that the two pairs of scarfing tips, i. e., the pairT1 and T2 and the pair T3 and T4, are moved horizontally inward untilthe tip T2 engages the right vertical face of the work-piece as viewedin Fig. 4 and the tip T4 engages the left vertical face of thework-piece. The downward movement of the forward end of tip arm 2|lowers the upper horizontal tip T1 until it rests on the top face of thework-piece, and the raising of the forward end of the tip arm 23 bringsthe lower horizontal tip Ta against the bottom face of the work-piece.The tip T4 will be raised by its tip arm 2t until the stop 54 abutsagainst the transverse member 32 on the tip arm 20. This stop preventsthe tip T4 from ever being raised beyond the level at which the upperend of this tip is substantially flush with the discharge face of thetip Ti and hence substantially flush with the top face of thework-piece. The forward end of the tip arm 22 which was held in itsraised neutral position by the member 58 on the tip arm 2!, descends byits own weight, when the forward end of the tip arm 26 is lowered, untilthe stop 55 abuts against the lower transverse member 39 connected tothe tip arm 23. The stop 55 prevents the tip T2 from ever being loweredbeyond the level at which its lower end is substantially flush with thedischarge face-of the lower horizontal tip T3 and hence substantiallyflush with the bottom face of the workpiece. The torch tips will now bein the position shown in Fig. 4 with the full eflectivelength of eachtip being utilized to scarf the corresponding face of the work-piece. Inother words, the tips do not overlap but the entire width of each tip isactive and extends from one edge of the corresponding surface of thework-piece to the other. Larger workpieces than that represented in Fig.4 can be scarfed by increasing the effectlve widths of the tips andmaking appropriate changes in the length of the stop arms 54 and 56. Ifthe work-piece to'be scarfed has the same width as the work-piece shownin Fig. 4 but has a smaller vertical dimension, the torch tips will bemoved to the position shown in Fig. 5. The inward horizontal movement ofthe two pairs of tips will take place as described in connection withFig. 4, but the tip arm 2! and the upper horizontal tip T1 carried by itwill descend farther as shown in Fig. 5 to bring the tip T1 intoengagement with the newly located top face of the workpiece. As abovestated, the stop arm 54 will always keep the upper end of the tip T4substantially flush with the discharge face of the tip T1 60 when thetips are in operative position, and therefore the tip T4 will now bepositioned as shown in Fig. 5 with its upper end substantially flushwith the newly located top face of the work-piece on which the tip T1rests. The lower end of the :5 tip T4 will therefore vertically overlapthe lower horizontal tip T3 and the upper end of the tip T2 willvertically overlap the upper horizontal tip T1 as shown in Fig. 5, thisbeing permitted because the tips T1 and T2 have independent relativever- 70 tical movement and the tips Ta and T4 likewise have independentrelative vertical movement.

The particular machine illustrated in the drawings is not adapted toscarf work-pieces whose vertical dimension is any less in its relationto 75 the width of the tips than the vertical dimension 7 of thework-piece represented in Fig. 5, because the stop 51 prevents furthervertical approach of the two horizontal tips Ti and Ta. The stop 51could be designqt to allow closer approach of the horizontal tips T1 andT3 and thus permit scarflng of still thinner work-pieces, but theprincipal function of the stop 51 is to prevent the tips from comingtogether after the work-piece has passed beyond them, and it musttherefore hold the tips T1 and T3 at some minimum vertical spacing whenthere is no work-piece between them, and in Fig. the vertical dimensionof the work-piece is assumed to correspond to this desired minimumspacing between the horizontal torch tips. The distance that thevertical tips T2 and T4 can approach each other in a horizontaldirection is determined by the length of the stroke of the pistons offluid cylinders 52 and 53, these tips being shown at the inner limit oftheir horizontal movement in Fig. 6.

In Fig. 6 the work-piece W is represented as having a smaller horizontaldimension than the work-piece in Fig. 5 but the same vertical dimension.By comparing Figs. 5 and 6 it will be seen that the tips are positionedagainst the four faces of the work-piece in the same manner as describedin connection with Fig. 5 except that the tip arms 21 and 22 have beengiven at additional inward horizontal movement to bring the verticaltips T2 and T4 closer together horizontally. Since the tips T1 and T2move horizontally in unison (as do the tips T3 and T4), the upperhorizontal tip Tl will now horizontally overlap the upper end of the tipT4 and the lower horizontal tip T: will horizontally overlap the lowerend of the tip T2 as shown in Fig. 6.

The billet or other work-piece to be scarfed is usually fed to andthrough the scarfing apparatus by power-driven conveyor rolls on whichthe work-piece is supported, and therefore the bottom face of thework-piece, regardless of the cross-sectional dimensions of thework-piece, will always be at substantially the same elevation.Moreover, a stationary guide is usually placed along the roller bed inadvance-of the scarfing apparatus against which one side of the billet,or other work-piece, slides as it is delivered to the scarfingapparatus. Usually the guide is positioned so that the left verticalface of the workpiece engages it. In this case the left vertical face ofthe work-piece will always occupy the same vertical plane regardless ofthe cross-section-al dimensions of the work-piece. When such a guide isused and when the work-piece is fed to and through the scarfingapparatus by conveyor rolls on which the work-piece is supported, theforward end of the tip arm 23, and the lower horizontal tip T3 carriedby it, will always be moved from neutral position to the same operativeposition. Moreover, the forward end of the tip arm 24, and the tip T4carried by it, will never be farther to the right than shown in Figs. 4,5 and 6 when the tip T4 is against the left vertical face of thework-piece.

As above stated, the tips are returned to neutral or inoperativeposition after each scarflng operation, i. e., the forward ends of thetip arms 2! and 22, and the tips T1 and T2 carried by them, are movedupward and outward, and the forward ends of tip arms 23 and 24, and thetips Ta and T4 carried by them, are moved downward and outward from theposition shown in Fig. 4. The forward end of arm 2| in moving upwardwill bring the member 58 into contact with the clamp 43, and thereforethe arm 22 will be moved upward by the arm 2|. Since the forward ends ofboth arms are moved downward by their own weight, the one fluid cylinderthat raises the for- 1s ward end of tip arm 2| sumces to operate bothtip arms 2| and 22. Similarly, when fluid is released from the cylindersand 3| to permit the forward ends of tip arms 23 and 24 to descend toneutral position by gravity, the member 59 on the tip arm 23 engages theclamp l1 and insures that the forward end of tip arm 24 moves downwardto neutral position along with the forward end of tip arm 23.

When the scarfing tips are in overlapping rela- 15 tion as in Figs. 5and 6, so that two or all of the tips project beyond the correspondingfaces of the work-piece, the effective length of each projecting tip isprefer-ably altered so that it will conform to the width of the surfacewhich it scarfs. This may be accomplished by plugging the outletorifices from which the preheating flames and the scarfing oxygen jetsissue in the portion of each tip that projects beyond the correspondingsurface of the work-piece, or by shutting off the supply of preheatinggases and scarfing oxygen to such orifices by suitable valves.

It will now be seen that the apparatus is adapted to simultaneouslyscarf all four faces of a billet or other work-piece regardless of thecross-sectional dimensions of the work-piece provided they fall withinpredetermined maximum and minimum limits. For any size work-piece withinthose limits each tip will move toward scarfing position until itengages the corresponding surface of the work-piece, and despite theoverlapping relation that the tips must assume for work-pieces which aresmaller than the maximum size work-piece that the apparatus is adaptedto scarf, and despite the substantially coplanar relation they sometimesassume, there is no interference between the tips, nor can the apparatusbe so operated as to cause them to interfere. Each tip always moves toand from operative position at all times without contacting with anyother tip. This is due principally to the mounting of the tips whichpermits horizontal and vertical movements of each tip, the

preserved horizontal distance or relationship between the two tips ofeach pair, the fact that each tip of each pair can move verticallyindependently of the other tip, and to the stop arrangement described.

I claim:

1. Apparatus for scarfing billets, blooms, slabs, and the like,comprising a tip arm carrier at each side of the apparatus, a pair oftip arms mounted in each carrier and extending longitudinally of thebillet or the like to be scarfed, the two tip arms in each carrier beingpivotally mounted therein for independent movement in vertical planesabout horizontal axes, each of said carriers being pivotally mounted formovement about a vertical axis whereby the forward ends of the two tiparms carried by it are movable in unison horizontally, a horizontallydisposed scarfing tip mounted on the forward end of one tip arm of eachpair and a vertically disposed scarfing tip mounted on the forward endof the other tip arm of each pair, the scarflng tips thus mounted on thetip arms constituting two pairs of rightangularly related tips one ofwhich pairs of tips is adapted to scarf the top face and one verticalface of the work-piece and the other of which pairs of tips is adaptedto scarf the bottom face and the other vertical face of the work-piece,

actuating means for moving said tip arms about their horizontal axes toadjust the scarfing tips vertically, and actuating means connected tosaid carriers for moving them about their vertical axes to adjust thetwo pairs of scarfing tips horizontally.

2. Apparatus in accordance with claim 1 having stop means operativelypositioned between the tip arm that carries the horizontal tip of onepair of tips and the tip arm that carries the vertical tip of the otherpair of tips to prevent relative vertical movement between the forwardends of such tip arms which would cause the vertical tip to verticallyoverlap the horizontal tip.

3. Apparatus for scarfing billets, blooms, slabs, and the like,comprising a tip arm carrier at each side of the apparatus, a pair oftip arms mounted in each of said carriers and extending longitudinallyof the billet or the like to be scarfed, one tip arm of each pair beingan inner tip arm and the other being an outer tip arm, the two tip armsof each pair being pivotally mounted in the corresponding carrier forindependent movement in a vertical plane about a horizonal axis wherebythe forward end of each tip arm of the pair is movable vertically, eachof said carriers being movable about a vertical axis whereby the forwardends of the tip arms mounted in it are movable horizontally in unison, atransverse member connected to the forward end of the outer tip arm ofeach pair, one of said members extending transversely over thework-piece and the other extending transversely under the workpiece, ahorizontally disposed scarfing tip carried by each of said transversemembers, a vertically disposed scarfing tip carried by the forward endof the inner tip arm of each pair, the scarfing tips thus supported onthe tip arms constituting two pairs of right-angularly related tips oneof which pairs of tips is adapted to scarf the top face and one verticalface of the work-piece and the other of which pairs of tips is adaptedto scarf the bottom face and the other vertical face of the work-piece,and means for actuating the tip arms about said axes to adjust thescarfing tips horizontally and vertically.

4. Apparatus in accordance with claim 3 having stop means positionedbetween the inner tip arm of each pair and the transverse memberconnected to the outer tip arm of the other pair and operating toprevent the vertically disposed tip of each pair of tips from verticallyoverlapping the horizontal tip of the other pair.

5. Apparatus for scarfing billets, blooms, slabs, and the like,comprising a pair of tip arms at each side of the apparatus extendinglongitudinally of the billet or the like to be scarfed, the two tip armsof each pair being mounted for pivotal movement about vertical andhorizontal axes whereby the forward ends of the arms are movablehorizontally and are independently movable vertically, a horizontally,disposed scarfing tip mounted on the forward end of one tip arm of onepair for scarfing the top face of the workpiece, a vertically disposedscarfing tip mounted on the forward end of the companion tip arm of thesame pair for scarfing the adjacent vertical face of the work-piece, asecond horizontally disposed scarfing tip mounted on the forward end ofone tip arm of the second pair for scarfing the bottom face of thework-piece, a second vertically disposed scarfing tip mounted on theforward end of the companion tip-arm oi the second pair for scarfing theother vertical face of the work-piece, means for actuating the tip armsabout said axes to adjust the scarfing tips horizontally and vertically,and a member on the forward end of the tip arm that carries the upperhorizontal scarfing tip adapted after predetermined upward movement ofsuch arm to engage the companion arm of the same pair whereby when theupper horizontal tip is raised to the upper limit of its travel by itstip arm the vertical tip carried by the companion tip arm is also raisedto the upper limit of its travel.

6. Apparatus in accordance with claim 5 having a member on the forwardend of the tip arm that carries the lower horizontal scarfing tipadapted after predetermined downward movement of such arm to engage thecompanion arm of the same pair whereby when the lower horizontal tip islowered to the lower limit of its travel by its tip arm the vertical ticarried by the companion tip arm is also lowered to the lower limit ofits travel.

7. Apparatus for simultaneously scarfing the four surfaces ofrectangular ferrous metal bodies comprising four scarfing tips each ofwhich is adapted to be positioned adjacent one of the work surfaces tobe scarfed and being substantially as wide as the widest such surfacethe apparatus is designed to scarf, supporting means for supporting thetips with their inner faces in rectangular formation so that they definea central opening for the body to be scarfed and including two pairs ofmembers, each member of each pair rigidly supporting one tip of a pairof contiguous angularly related tips, a common carrier for the twomembers of each pair, each carrier being movable to effect unitarymovement in one direction of the two members carried by it, and the twomembers of each pair being pivotally mounted in their carrier forrelative movement in a second direction at right angles to the firstdirection whereby when the members of each pair are actuated to move thetwo contiguous tips carried by them to operative position with respectto the corresponding work surfaces the inner face of one tip of the paircan overlap the end of the second tip in the direction in which themembers are relatively movable but the inner face of the second tipcannot overlap the end of the first tip in the direction in which themembers are unitarily movable, actuating means oneratively connected tosaid members, and stop means for preventing each tip whose one end iscapable of being overlapped by the inner face of a contiguous tip fromhaving its other end overlapped by the inner face of the tip contiguousto that end.

8. Apparatus in accordance with claim 7 in which said stop means ispositioned between the two members which support the two tips whoseoverlapping is prevented by the stop means.

REIDAR J. NICOLAISEN.

REFERENCES crrnn The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number i Name Date 2,125,175 Jones July 26, 19882,276,329 Miller et al Mar. 1'7, 1942 2,308,684 Chelborg Jan. 19, 19432,323,977 Chelborg et a1 July 13, 1943 2,429,326 Miller et al. Oct. 21,1947

